Anthropology: Adam and Eve hominids in the Garden of Eden.
Humans were not alone on the evolutionary path. There would always be at least one more type of hominid existing nearby until the last 13,000 years (Hobbits). If the number of chromosomes was very close then fertile offspring were possible. The case for neanderthal closeness is still not yet known for sure. Some make bold claims about humans having neanderthal genes, but note that we did have a common ancestor.

"This is the Garden of Eden love, from the volcano God."

Take it with a pinch of salt about us being Neanderthal, Denisovan, human hybrids. This is fairytale stuff. Neanderthals were mainly in Europe and Denisovans were for the most part in southeast Asia. This would mean that humans from Africa would be genetically pure. However, the Neanderthal gene chains are also in them. Perhaps these genes are common to most hominids.

Only a few decades ago many scientists loudly proclaimed that people came out of Africa to populate the world only 80,000 years ago. This has now been pushed back to 200,000 years. When humans moved into Europe 40,000 years ago they did not have the largest brains. Neanderthals were hands down winners. Indeed, Homo erectus did draw and carve. And stone tools was old technology for 3 million years before the present.

Humans are not special. We did get down to a few dozen survivors at one time. It is just good luck for us that we are here and Neanderthals are not. Furthermore, perception of a God is not unique to humans. Burial practices go back 400,000 years. If there is an afterlife, expect to see a some Neanderthals and Denisovans walking around in heaven.